Timestamp Converter
Unix timestamp and datetime conversion tool with timezone support
Timestamp Converter
Batch Convert
⏰ Real-time Clock
Common Times
Quick Actions
Time Zone Info
Complete Timestamp Guide
Deep dive into timestamp concepts, format standards, and programming practices
What is Unix Timestamp?
Unix timestamp is the number of seconds since January 1, 1970, 00:00:00 UTC, also known as the "Unix Epoch". This date was chosen as the starting point for computer system time because it was an important milestone during Unix operating system development.
Why January 1, 1970?
- • Historical context of Unix system development
- • Technical limitations of 32-bit systems
- • Need for global standardized time
- • Integer format for easy calculation and storage
Year 2038 Problem
32-bit systems will overflow on January 19, 2038, 03:14:07 UTC, requiring upgrades to 64-bit systems or other solutions.
Timestamp Format Details
Unix Timestamp (Seconds)
10 digits, accurate to seconds
JavaScript Timestamp (Milliseconds)
13 digits, accurate to milliseconds
ISO 8601 Standard
International standard date-time representation
Timestamps in Programming Languages
JavaScript
Date.now() / Math.floor(Date.now() / 1000)new Date(timestamp * 1000)Python
import time; time.time()datetime.fromtimestamp(timestamp)Java
System.currentTimeMillis() / 1000new Date(timestamp * 1000L)PHP
time()date("Y-m-d H:i:s", $timestamp)Timezone Handling Best Practices
Store in UTC
Always use UTC timestamps in databases
Display in Local Timezone
Convert to user timezone on frontend display
Daylight Saving Time
Consider DST transitions in calculations
ISO 8601 Format
Use standard format for API interfaces
Real-world Use Cases
📊 Log Analysis
- • Server log time conversion
- • Error tracking time location
- • Performance monitoring data
🗄️ Database Operations
- • Record creation and update time
- • Data archiving and cleanup
- • Time range query optimization
🔄 API Development
- • Request timestamp validation
- • Cache expiration time setting
- • Token and session management
Conversion Examples
Common Timestamp Values
Time Calculation Tips
Related Tools & Resources
Development Checklist
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